loop0: detected capacity change from 0 to 22
MTD: Attempt to mount non-MTD device "/dev/loop0"
romfs: Mounting image 'rom 637cf1fa' through the block layer
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4431 Comm: syz.0.82 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : filldir64+0x560/0x9e4 fs/readdir.c:337
lr : filldir64+0x538/0x9e4 fs/readdir.c:337
sp : ffff80001fc87990
x29: ffff80001fc87a00 x28: 1ffff00003f90f98 x27: 0000000020000ff0
x26: ffff80001fc87cb8 x25: 0000002000100000 x24: 0000000020001000
x23: 0000000000000005 x22: ffff80001fc87ae0 x21: dfff800000000000
x20: ffff80001fc87cc0 x19: 00000000fffffff2 x18: 0000000000000000
x17: 0000000000000002 x16: ffff800008925c2c x15: ffff80001fc87ae0
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000020001000 x9 : 0000ffffffffffff
x8 : 0000000000000020 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 filldir64+0x560/0x9e4 fs/readdir.c:337
 dir_emit include/linux/fs.h:3713 [inline]
 romfs_readdir+0x358/0x4a0 fs/romfs/super.c:199
 iterate_dir+0x1f0/0x4cc fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x11c/0x340 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 2a1f03f3 2a1f03e0 b85fc3a8 78000948 (2a1303e1) 
---[ end trace 2031345df5df943e ]---
----------------
Code disassembly (best guess):
   0:	2a1f03f3 	mov	w19, wzr
   4:	2a1f03e0 	mov	w0, wzr
   8:	b85fc3a8 	ldur	w8, [x29, #-4]
   c:	78000948 	sttrh	w8, [x10]
* 10:	2a1303e1 	mov	w1, w19 <-- trapping instruction